Method and apparatus for traffic offloading procedure management in a public safety communication system

• US 9,107,130 B2
• Filed: 06/18/2013
• Issued: 08/11/2015
• Est. Priority Date: 06/18/2013
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Pandey, Aparna, Bhandiwad, Harish, Ekl, Randy L.
• Primary Examiner(s): Kasraian, Allahyar
• Application Number:
  US13/920,537
• Publication Number:
  US 20140370895A1
• Time in Patent Office: 784 Days
• Field of Search: 455436-444, 455/518, 455/519, 370331-333, 370230-232, 370/235, 370/236, 370/237
• US Class Current: 1/1
• CPC Class Codes: H04W 28/0846 between network providers, e.g. operators selecting a network or a communication service H04W40/18
• CPC Class Codes: H04W 36/0009 for a plurality of users or terminals, e.g. group communication or moving wireless networks user group management H04W4/08; processing of subscriber group data H04W8/186
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Abstract

A system provides for traffic offloading in a Public Safety communication system. The system includes multiple user equipment (UEs), each a member of a same communications group, and a services network element configured to receive information comprising an identifier of the communications group, an identifier of each UE of the multiple UEs, and an identifier of a cell of a primary network where each UE resides; store, in association with each UE identifier, the communications group identifier and the primary network cell identifier; determine that a primary network cell is congested; responsive to determining that the cell is congested, determine a subset of the multiple UEs that are members of the communications group, reside in the congested cell, and are capable of being served by one or more secondary networks; and instruct the subset of UEs to offload their communications group traffic to the one or more secondary networks.

Claims

1. A method for traffic offloading procedure management in a Public Safety communication system, the method comprising:

receiving, by a service network element, information comprising an identifier of a communications group, an identifier of each user equipment (UE) of a plurality of UEs that are members of the communications group, and an identifier of a cell of a primary network where each UE of the plurality of UEs resides;

storing, by the service network element and in association with the identifier of each UE of the plurality of UEs, the identifier of the communications group and the identifier of the cell of the primary network where each UE of the plurality of the UEs resides;

determining, by the service network element, that a cell of the primary network is congested;

in response to determining that the cell of the primary network is congested, determining, by the service network element, a subset of the plurality of UEs, wherein the subset of the plurality of UEs are members of the communications group, reside in the congested cell, and are capable of being served by one or more secondary networks; and

instructing, by the service network element, the subset of the plurality of UEs to offload their traffic associated with the communications group to the one or more secondary networks, causing bearers associated with the traffic of the communication group of the subset of the plurality of the UEs to route their traffic via the one or more secondary networks.

2. The method of claim 1, wherein receiving, by the service network element, the identifier of the communications group comprises receiving the identifier of the communications group from an application function.

3. The method of claim 1, where receiving, by the service network element, the identifier of the communications group comprises receiving the identifier of the communications group from each (UE) of the plurality of UEs.

4. The method of claim 3, wherein receiving, by the service network element, the identifier of the communications group from each (UE) of the plurality of UEs comprises receiving, by an application layer client of the service network element, the identifier of the communications group from an application layer client of each UE of the plurality of UEs.

5. The method of claim 1, wherein instructing comprises instructing the subset of the plurality of UEs to offload their traffic associated with the communications group to the one or more secondary networks while engaged in a group communication session involving the communications group.

6. The method of claim 1, further comprising setting up a group communication session involving the communications group, wherein setting up the group communication session comprises setting up one of a dedicated bearer and a default bearer in association with each user equipment (UE) of the plurality of UEs.

7. The method of claim 1, wherein instructing the subset of the plurality of UEs to offload their traffic associated with the communications group to the one or more secondary networks comprises instructing the subset of the plurality of UEs to hand off to a plurality of secondary networks.

8. The method of claim 1, wherein a secondary network of the one or more secondary networks backhauls data through a different core network than is used by the primary network.

9. The method of claim 1, wherein a secondary network of the one or more secondary networks backhauls data through a same core network as is used by the primary network.

10. The method of claim 1, wherein storing, by the service network element and in association with the identifier of each UE of the plurality of UEs, the identifier of the communications group and the identifier of the cell of the primary network where the UE resides, further comprises storing one or more bearer identifiers associated with the communications group.

11. A services network element that provides for traffic offloading procedure management in a Public Safety communication system, the services network element comprising:

a processor;

one or more network interfaces that are configured to receive information comprising an identifier of a communications group, an identifier of each user equipment (UE) of a plurality of UEs that are members of the communications group, and an identifier of a cell of a primary network where each UE of the plurality of the UEs resides; and

at least one memory device that is configured to store instructions that, when executed by the processor, cause the processor to;

store, in association with the identifier of each UE of the plurality of UEs, the identifier of the communications group and the identifier of the cell of the primary network where the UE resides;

determine that a cell of the primary network is congested;

in response to determining that the cell of the primary network is congested, determine a subset of the plurality of UEs, wherein the subset of the plurality of UEs are members of the communications group, reside in the congested cell, and are capable of being served by one or more secondary networks; and

instruct the subset of the plurality of UEs to offload their traffic associated with the communications group to the one or more secondary networks, causing bearers associated with the traffic of the communication group of the subset of the plurality of the UEs to route their traffic via the one or more secondary networks.

12. The services network element of claim 11, wherein the stored instructions, when executed, cause the processor to receive the identifier of the communications group by receiving the identifier of the communications group from an application function.

13. The services network element of claim 11, wherein the stored instructions, when executed, causes the processor to receive the identifier of the communications group by receiving the identifier of the communications group from each (UE) of the plurality of UEs.

14. The services network element of claim 13, wherein the stored instructions, when executed, cause the processor to receive the identifier of the communications group from each (UE) of the plurality of UEs by receiving, by an application layer client of the service network element, the identifier of the communications group from an application layer client of each UE of the plurality of UEs.

15. The services network element of claim 11, wherein the stored instructions, when executed, cause the processor to instruct the subset of the plurality of UEs to hand off by instructing the subset of the plurality of UEs to offload their traffic associated with the communications group to the one or more secondary networks while engaged in a group communication session involving the communications group.

16. The services network element of claim 11, wherein the at least one memory device is configured to store instructions that, when executed, cause the processor to set up a group communication session involving the communications group, wherein setting up the group communication session comprises setting up one of a dedicated bearer and a default bearer in association with each user equipment (UE) of the plurality of UEs.

17. The services network element of claim 11, wherein the stored instructions, when executed, cause the processor to instruct the subset of the plurality of UEs to offload their traffic associated with the communications group by instructing the subset of the plurality of UEs to hand off to a plurality of secondary networks.

18. The services network element of claim 11, the network interface is configured to receive backhauled data from a secondary network of the one or more secondary networks via a different core network than is used by the primary network.

19. The method of claim 11, wherein a secondary network of the one or more secondary networks backhauls data through a same core network as is used by the primary network.

20. A system that provides for traffic offloading procedure management in a Public Safety communication system, the system comprising:

a plurality of user equipment that are each a member of a same communications group;

a services network element that is configured to;

receive information comprising an identifier of the communications group, an identifier of each user equipment (UE) of the plurality of UEs, and an identifier of a cell of a primary network where each UE of the plurality of UEs resides;

store, in association with the identifier of each UE of the plurality of UEs, the identifier of the communications group and the identifier of the cell of the primary network where each UE of the plurality of the UEs resides;

determine that a cell of the primary network is congested;

in response to determining that the cell of the primary network is congested, determine a subset of the plurality of UEs, wherein the subset of the plurality of UEs are members of the communications group, reside in the congested cell, and are capable of being served by one or more secondary networks; and

instruct the subset of the plurality of UEs to offload their traffic associated with the communications group to the one or more secondary networks, causing bearers associated with the traffic of the communication group of the subset of the plurality of the UEs to route their traffic via the one or more secondary networks.